Port And Cable Assignments; Rj-45 Port Description; Straight-Through Wiring; Crossover Wiring - Alcatel OS-6124 Getting Started Manual

Port and Cable Assignments

RJ-45 Port Description

RJ-45 station ports (MDI-X) can be attached to
any devices that use a standard network
interface (e.g., a workstation, server, bridge or
router). RJ-45 daisy-chain ports (MDI) can be
cascaded to a station port on similar
networking devices (e.g., another switch or hub). Use unshielded twisted-pair (UTP)
or shielded twisted-pair (STP) cable for RJ-45 connections: 100-ohm Category 3, 4
or 5 cable for 10 Mbps connections or 100-ohm Category 5 cable for 100 Mbps
connections. Also be sure that the length of any twisted-pair connection does not
exceed 100 meters (328 feet).
Pin
1
2
3
6
4,5,7,8

Straight-Through Wiring

If the twisted-pair cable is to join two ports and only one of the ports has an internal
crossover (MDI-X), the two pairs of wires must be straight-through.
End 1
1 (RD+)
2 (RD-)
3 (TD+)
6 (TD-)

Crossover Wiring

If the twisted-pair cable is to join two ports and either both ports are labeled with an
"X" (MDI-X) or neither port is labeled with an "X" (MDI), a crossover must be
implemented in the wiring.
End 1
1 (TD+)
2 (TD-)
3 (RD+)
6 (RD-)
MDI-X Signal Name
Receive Data plus (RD+)
Receive Data minus (RD-)
Transmit Data plus (TD+)
Transmit Data minus (TD-)
Not Used
Straight-Through RJ-45 Pin Assignments
Crossover RJ-45 Pin Assignments
Port and Cable Assignments
MDI Signal Name
Transmit Data plus (TD+)
Transmit Data minus (TD-)
Receive Data plus (RD+)
Receive Data minus (RD-)
Not Used
End 2
1 (TD+)
2 (TD-)
3 (RD+)
6 (RD-)
End 2
3 (RD+)
6 (RD-)
1 (TD+)
2 (TD-)
8
8
1
1
17